Black-out screening



April 0, 1945. H. N. RENTON BLACKTOUT} SCREENING Filed Jan. 19, 1942 INVENTOR:

R. N v M w Patented Apr. 10, 1945 Y UN- irm an nit as I Henry. N. Rentorn, Wyncote Pa ;a issi gnorv to/lhe American. Halley. Company, Philadelphia; .Pin, .a corporation. of Pennsylvania" Application January 19, 1942;1Serial Nor-423315 7'Cfaims. (c1. 20 -61.)

Thisinvention relates to auxiliary screening ably ma'de -to plain chevrom or triangular"cross for windows, and"has referencemoreparticularly section as'show-n in Fig;- ZWitlitheirsides 'spaced' to black-out'screening-t prevent egress f light" by'arr angle somewhere"- between fifty and" sev--- from the interiors ofbuildings through window enty degrees; and theirsurfaces coated with dark and'door apertures duringb'ombin'g-Iairwaids; light-absorbingpaint or otherwise'treatedso as My invention has for its chief'aim' to provide to be-non-reflecting; the verticalspacingofsaid anauxiliary screening means which lendsitself to bars being: suchthat substantially one-half the ready and expeditiousmanufacture in quantity side area of-one-is overlapped by theonedirectlyatirelativelysmall cost, and which can be applied above: it} With the" vanes constructed and ar= to or. removed from existing windows'in a miniis" ranged'as just described, itwill b'e seen from Fig-: 2"-

mumof time andwithout necessitating theexerthat neither direct nor reflected light canposciseof anyspecial skill orthe useofspecial' tools. siblypassthrough'the intervals between adjacent Other objects and attendant advantages will' bars:

appear: from the following detailed description of Secured tothe lowerrail'of'the sash I flfisa strip the attached'drawin'gs; wherein; Fig; 1"i's-'an out-'--' Ibf of' right angular cross section; whereof the side=elevation of'a window which is supplemented pendent flange IT overlaps the sillil ofthe' main by: an auxiliary screening r structure conveniently window' framewhen the sash; is inclosed position,

embodying my invention. to-light-seal' the window at that region. From Fig; Z is'avertical'sectional'view-with interme' Fig. 3 it'will'b'e notedithat angle strips I8 are diate portions broken out; taken as indicated by to also secured to-the side-rails I4f of the sash I0, the angled arrows II--II in Figzl; and" the lateral flanges lfl 'of these strips engaging Fig; 3 is a; detail crosssectionahviewtaken as shouldered marginalrecessionsdll alongthe inner indicated by the angled arrows III-III iniFigs. side faces of the correspondingjambmembers 6" l and'2 v of thesupplemental framea. T-he lower sash is With more detailed reference firstmore par- 2: hel'd'in the-assembly by retaining strips ZI'whic-h ticularly'to Figs; 1-3 of. thesedrawings, the nuare secured by screws' '22 t'o thesid'e rails- 6 of'the mera'l I comprehensively designates? a window supplemental-frame and: which in: conjunction opening in a building into'which is'seta metallic with: the shouldered recessions form guide windowtframe'ofiwellknown construction, wheregrooves in which the lateral flanges I 9 of the sash of. thezlintel isrindicatedat 2', the-side jambsat 3f IIl'slide; As shown in Fig. 2, the strips-ill extend and the. sill at: t. The screening means with only halfway ofth'e heightpf'th eauxiliary frame which the presentinvention is more especially sonthat the sash can be inserted orwithdrawn concerned is: in this instance in the form of-"a from above. As alsoshown in: Fig; 2; the lower supplemental ori auxiliary structure'applied to the framerail of'thesash I 3-is provided as at 2'3 with outsideof-theiwindow. As shown, it comprises a water'draina'ge apertures;

framewith atopbarzor lint e1 5 and-with'side verti- The upper sash I I is in the form of'a panel of cals or jambs 6, which may be ofwo'o'd and'which sheetm'etal whichis reinforcedby"box like perimay besecured by'machine screws such as shown metric stiffening bars 25- and 21 welded or at l threadedly engaging tapped holes in the lintel otherwise secured together at; corners and atand side jambs of the permanent window frame. tached to the panel at the outside. If desired, the Slidable in the supplemental frame are lower panel may be medially reinforced by an auxiliary and upper sashes Ill and I I. The lower sash III stiffening ar 28 which y be l e Ot s is in the form of a louver constructed throughout above referred to. As instanced in Fig. 3, the from thin but stiff sheet material, preferably edge margins of the panel extend beyond the remetal, with a frame whereof the upper, lower and infol'cing bars 27 nd engage shouldered mar a side rails I2, I3 and M are of square channel recessions 29 along the out-side faces of the corcross section and secured together at corners in responding supplemental frame iambs 6, the upany convenient manner, as by welding. The inper sash being retained in the assembly by retainfield area of the lower sash is closed by a series ing strips 30 which are secured by screws 3I to of louver bars I5 which are of hollow channel said jambs, and which, in conjunction with the cross sectional configuration and horizontally arshouldered recessions 29, form guide grooves for ranged in parallel one above the other in spaced said edge margins. From Fig. 2 it will be obrelation and which have their ends suitably enserved that the strips 30 extend down to about the gaged and fixed within the hollows of the side middle of the supplemental frame so that the bars I4 of the sash. The louver bars are preferupper sash II can be inserted or withdrawn from While for convenience of illustration herein I I have shown the supplemental structure as applied to the out-side of a window, it is of course to be understood that, if desired it may be applied to the in-side without sacrifice of any of the advantages hereinbefore pointed out.

Having thus described my invention, I claim:

1. Screening for windows and the like in the form of an auxiliary unit intended for application over'the usual permanent window of a building including a supplemental frame with a top horizontal bar, vertical side or iamb bars, and with means for detachably securing said barsto the corresponding members of the permanent window; removable fiat strips of sheet material forming, in conjunction with shouldered marginal recessions along corresponding side faces of the jamb bars of the supplemental frame, sash guiding grooves; and a sliding sash having outwardly extending flangesalong its opposite side edges to engage the guide grooves formed in the iamb members of the supplemental frame as aforesaid.

2. Screening for windows and the like in the form of an auxiliary unit intended for application over the usual permanent windows of buildings including a supplemental frame with a top horizontal bar, vertical side or jamb bars, and with means for detachably securing said bars to the corresponding members of the permanent window; removable flat strips of sheet material forming, in conjunction with shouldered marginal recessions along opposite side faces of each jamb bar of the supplemental frame, innerand outer sash guiding grooves; and sliding sashes having their opposite side edges engaged in the corresponding pairs of guide grooves formed in the-iamb members of the supplemental frame as aforesaid.

3. Black-out screening for windows and the like in the form ofan auxiliary unit intended for application over the usual permanent windows of buildings including a supplementalframe witha top horizontal bar, vertical side or jamb bars, and with means for detachably securing said bars to the corresponding members of the permanent window; detachable flat strips of flexible sheet material forming, in conjunction with shouldered marginal recessions in corresponding side faces of the iamb bars of the supplemental frame, sash guiding grooves; a sliding ventilating sash having a series of louver bars of downwardly-open channel cross section arranged with the sides of one extending well below the hump or crest of its immediate neighbor so as to preclude traverse of either direct or reflected light from the interior of the building while permitting ventilation through the intervals between bars, said sash also having outwardly extending flanges along its opposite side edges to engage the guide grooves formed in the jamb members of the supplemental frame as aforesaid.

4. Black-out screening for windows and the like according to claim 3 in which detachable fiat strips of flexible sheet material are also attached to the opposite side faces of the respective Jamb bars of the supplemental frame to provide another pair of parallel sash guiding grooves; and further including a second sash in the form of an opaque panel of stiff sheet material with its opposite side edges engaging the other pair of corresponding guide grooves of the supplemental jamb bars.

5. An auxiliary sash frame of inverted U shaped configuration for application over permanent windows, comprising side or jamb bars and a connecting top bar to abut the corresponding elements of the frame of the permanent windows; and flexible strips of sheet material forming, in conjunction with shouldered marginal recessions along corresponding side faces of the jamb bars, guide grooves for retainment of a sliding sash.

6. An auxiliary sash frame of inverted U shaped configuration for application over permanent windows, comprising side or jamb bars and a connecting top bar to abut the corresponding elements of the frame of the permanent windew; and flexible strips of sheet material forming, in conjunction with shouldered marginal recessions along opposite side faces of the jamb bars, parallel pairs of grooves for inner and outer sliding sashes.

7. An auxiliary sash frame of inverted U shaped configuration for application over permanent windows, comprising side or jamb bars and a connecting to bar to abut the corresponding elements of the frame of the permanent window; flexible strips of sheet material forming. in conjunction with shouldered marginal recessions along opposite side faces of the jamb bars, parallel pairs f grooves for inner and outer sliding sashes; and a head strip secured to the lower face of the top bar, said strip being fashioned from flexible sheet material and providing a pendent flange to overlap the outer sash when the latter is in closed position.

HENRY N. RENTON. 

